Installation and Wiring 8
4-wire port C of a video intercom cannot be connected to 4-wire port B or D of another
video intercom to do data communication;
2.2.2 Cord Specification
Depending on the distance between the voice intercom and video intercom, you need to select
RVV4 cords of deferent specifications. See Table 2-1.
Cord specification
Table 2-1
Transmission distance (TD)
RVV4 cord specification
TD≤10m
RVV4×0.2mm²
10m<TD≤30m
RVV4×0.5mm²
30m<TD≤50m
RVV4×0.75mm²
If the distance between the voice intercom and video intercom is farther than 50m, please use
coaxial cables.
2.3
Wiring
Do not pull the cords violently; otherwise the cords might be broken.
During wiring, wrap the cord joints with insulated rubber tape; otherwise short circuit might
occur.
At most 2 voice intercoms and 3 video intercoms can be wired in one communication system.
